Impeller with optimized flow channel for middle-open type double suction pump

Abstract

The utility model discloses a middle-open type double suction pump runner optimization impeller. Relates to the technical field of double suction pumps. Comprising a body, a shaft hole is formed in the middle of the body, a plurality of first key grooves are formed in the two ends of the shaft hole, the shaft hole is used for installing a pump shaft, flat keys matched with the first key grooves are arranged on the pump shaft, a pair of penetrating holes is further formed in the body and located on the two sides of the shaft hole, the penetrating holes penetrate through the body, and the through holes are communicated with the shaft hole. A guide plate is arranged on each of the two sides of the body, a limiting column is arranged on the side, facing the body, of each guide plate, and the limiting columns are inserted into the penetrating holes; the guide plate is provided with a through hole coaxial with the shaft hole, the through hole is in a horn shape, the inner diameter of the through hole is gradually reduced in the direction close to the body, a plurality of second key grooves are formed in the inner side of the through hole, and the first key grooves and the second key grooves are correspondingly formed and can be communicated with each other. The impeller and pump shaft assembly structure has the characteristics of reducing the assembly difficulty between the impeller and the pump shaft and improving the connection reliability between the impeller and the pump shaft.

Description

Technical Field

[0001] This application relates to the field of double-suction pump technology, specifically to an optimized impeller for a split-type double-suction pump. Background Technology

[0002] Double-suction pumps, as an important type of centrifugal pump, are widely used in engineering due to their high head and large flow rate. The impeller of a double-suction pump is actually composed of two impellers placed back-to-back. The water flowing from the impellers converges into a volute, effectively making it equivalent to two single-suction impellers of the same diameter working simultaneously, thus doubling the flow rate for the same impeller outer diameter.

[0003] In existing technologies, the impeller and pump shaft of a double-suction pump are generally connected by a threaded connection or a key connection. If a threaded connection is used, the threads may wear or accumulate debris after prolonged use, which may affect the disassembly and assembly of the impeller and pump shaft. If a key connection is used, the key and keyway need to be reliably aligned during installation, which increases the installation difficulty and may also result in poor connection reliability. Utility Model Content

[0004] In order to overcome the problems of difficult assembly and poor reliability between the impeller and pump shaft in the prior art, this application provides an optimized impeller for the flow channel of a split-type double-suction pump.

[0005] This application adopts the following technical solution: a split-type double-suction pump flow channel optimized impeller, including a body, a shaft hole in the middle of the body, multiple first keyways at both ends of the shaft hole, the shaft hole for installing a pump shaft, a flat key adapted to the first keyway on the pump shaft, a pair of through holes on the body and on both sides of the shaft hole, the through holes penetrating the body, a guide plate on both sides of the body, a limiting post on the side of the guide plate facing the body, the limiting post being inserted into the through hole;

[0006] The guide plate is provided with a through hole coaxial with the shaft hole. The through hole is trumpet-shaped and the inner diameter of the through hole gradually decreases along the direction close to the body. The inner side of the through hole is provided with a plurality of second keyways. The first keyway and the second keyway are correspondingly arranged and can communicate with each other.

[0007] Optionally, the limiting post is provided on one side of the guide plate, and an inner ring is provided on the other side of the guide plate. A locking block is adaptedly screwed on the pump shaft, and an outer ring is provided at the end of the locking block facing the guide plate. The inner wall of the outer ring and the outer wall of the inner ring can be connected by threads.

[0008] Optionally, after the outer ring is screwed onto the outside of the inner ring, the limiting post is completely displaced to the inside of the perforation and the guide plate is in contact with the body.

[0009] Optionally, a piston is provided at one end of the limiting post located inside the perforation. The outer wall of the piston is in contact with the inner wall of the perforation, while the outer wall of the limiting post is separate from the inner wall of the perforation. A limiting tube is also screwed into the perforation, with the limiting post passing through the limiting tube and the piston located outside the limiting tube.

[0010] A compression spring is provided between the two limiting posts within the same perforation. When the guide plate is in contact with the body, the compression spring is in a compressed state.

[0011] Optionally, the length of the limiting tube is less than the length of the limiting post, and the inner diameter of the limiting tube is less than the outer diameter of the piston.

[0012] Optionally, one end of the compression spring is connected to the end of one of the limiting posts inside the perforation, and the other end of the compression spring is connected to the end of another limiting post inside the perforation.

[0013] Compared with the prior art, this application provides guide plates with through holes on both sides of the main body, which makes it easy for operators to quickly and accurately insert the pump shaft into the shaft hole and make the flat key in a mating state with the first keyway and the second keyway. At the same time, the locking effect of the locking block on the guide plate improves the connection reliability between the pump shaft and the main body. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this application;

[0015] Figure 2 This is a reference for the assembly state of this application and the pump shaft. Figure 1 ;

[0016] Figure 3 Reference to the assembly state of this application and the pump shaft Figure 2 ;

[0017] Figure 4 Figure 3 Enlarged structural reference diagram at point A;

[0018] In the diagram: 1. Body; 11. Shaft hole; 12. First keyway; 13. Through hole; 14. Limiting tube; 2. Pump shaft; 21. Flat key; 22. External thread; 3. Guide plate; 31. Limiting post; 311. Piston; 312. Compression spring; 32. Through hole; 33. Second keyway; 34. Inner ring; 4. Locking block; 40. Outer ring. Detailed Implementation

[0019] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] like Figure 1-4 As shown, the split-type double-suction pump impeller includes a body 1. A shaft hole 11 is provided in the center of the body 1. Multiple first keyways 12 are provided at both ends of the shaft hole 11. The shaft hole 11 is used to install a pump shaft 2. The pump shaft 2 is provided with a flat key 21 adapted to the first keyways 12. A pair of through holes 13 are also provided on the body 1 on both sides of the shaft hole 11. The through holes 13 are parallel to the shaft hole 11 and penetrate the body 1. Two limiting posts 31 and two limiting tubes 14 are provided in each through hole 13. One end of one limiting tube 14 is flush with one end of the through hole 13, and one end of the other limiting tube 14 is flush with the other end of the through hole 13. Both limiting tubes 14 are screwed into the through hole 13, and there is a distance between the two limiting tubes 14. One end of the limiting post 31 is located on the outside of the body 1, and the other end of the limiting post 31 passes through a limiting tube 14 and extends between the limiting tube 14 and another limiting tube 14. A compression spring 312 is provided between the two limiting posts 31 in the same through hole 13. One end of the compression spring 312 is connected to the end of one of the limiting posts 31 in the through hole 13, and the other end of the compression spring 312 is connected to the end of the other limiting post 31 in the through hole 13. A piston 311 is also provided on the other end of the limiting post 31. The outer wall of the piston 311 is in contact with the inner wall of the through hole 13. The length of the limiting tube 14 is less than the length of the limiting post 31, and the inner diameter of the limiting tube 14 is less than the outer diameter of the piston 311. A guide plate 3 is provided on both sides of the main body 1. The end of the limiting post 31 located outside the through hole 13 is connected to the main body 1. That is to say, each main body 1 is connected to two limiting posts 31. When the guide plate 3 is moved, the limiting post 31 will move towards the inside of the through hole 13 and compress the compression spring 312.

[0021] The guide plate 3 has a through hole 32 coaxial with the shaft hole 11. The through hole 32 is trumpet-shaped, and its inner diameter gradually decreases towards the body 1. That is, the two through holes 32 open towards the sides of the body 1, so that the pump shaft 2 can be inserted into the shaft hole 11 coaxial with the through hole 32 more quickly under the guidance of the through hole 32. Furthermore, a plurality of second keyways 33 are provided on the inner side of the through hole 32. The first keyway 12 and the second keyway 33 are correspondingly arranged and can communicate with each other. When the pump shaft 2 is inserted into the through hole 32, by rotating the pump shaft 2, the flat key 21 can be quickly and accurately inserted into the second keyway 33. During the process of the flat key 21 being inserted into the second keyway 33, the flat key 21 and the second keyway 33 will collide with each other and generate vibration. This vibration can be transmitted to the operator's hand, that is, the operator can feel the insertion of the flat key 21 by touch, thus realizing blind operation. Once the flat key 21 is inserted into the second keyway 33, the pump shaft 2 can be moved further into the shaft hole 11 until one end of the flat key 21 is located in the second keyway 33 and the other end is located in the first keyway 12, thus achieving a reliable and stable connection between the pump shaft 2 and the body 1.

[0022] The limiting post 31 is located on one side of the guide plate 3, and the other side of the guide plate 3 is provided with an inner ring 34. A locking block 4 is adaptedly screwed onto the pump shaft 2. The end of the locking block 4 facing the guide plate 3 is provided with an outer ring 40. The inner wall of the outer ring 40 and the outer wall of the inner ring 34 can be connected by threads. When the outer ring 40 is screwed onto the outside of the inner ring 34, the limiting post 31 is completely displaced to the inside of the through hole 13 and the guide plate 3 is in contact with the body 1. After the flat key 21 is inserted into the first keyway 12, a locking block 4 can be screwed into both sides of the pump shaft 2. As the locking block 4 is screwed into the external thread 22 on the outer wall of the pump shaft 2 and gradually approaches the guide plate 3, the outer ring 40 on the locking block 4 will also gradually approach the inner ring 34. When the locking block 4 continues to rotate, the outer ring 40 will be fitted onto the outside of the inner ring 34, and a threaded connection will be formed between the outer ring 40 and the inner ring 34. In this way, when the outer ring 40 rotates until the inner ring 34 is completely fitted, the locking block 4 will also push the guide plate 3 to be completely fitted with the body 1, thereby achieving the locking effect on the guide plate 3 and ensuring that there will be no loosening between the body 1 and the pump shaft 2 during the operation of the body 1. Furthermore, since the threaded connection between the locking block 4 and the pump shaft 2 only serves to assist in ensuring the tightness of the connection between the pump shaft 2 and the body 1, even if the external thread 22 on the pump shaft 2 wears, it will not affect the reliability of the connection between the pump shaft 2 and the body 1, thus ensuring that the body 1 and the pump shaft 2 can be in a stable working state.

[0023] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A split-type double-suction pump flow channel optimized impeller, comprising a body (1), wherein a shaft hole (11) is provided in the middle of the body (1), and multiple first keyways (12) are provided at both ends of the shaft hole (11), the shaft hole (11) is used to install a pump shaft (2), and the pump shaft (2) is provided with a flat key (21) adapted to the first keyways (12), characterized in that, A pair of through holes (13) are provided on the body (1) and on both sides of the shaft hole (11). The through holes (13) penetrate the body (1). A guide plate (3) is provided on both sides of the body (1). A limiting post (31) is provided on the side of the guide plate (3) facing the body (1). The limiting post (31) is inserted into the through hole (13). The guide plate (3) is provided with a through hole (32) coaxial with the shaft hole (11). The through hole (32) is trumpet-shaped and the inner diameter of the through hole (32) gradually decreases along the direction close to the body (1). The inner side of the through hole (32) is provided with a plurality of second keyways (33). The first keyway (12) and the second keyway (33) are correspondingly arranged and can communicate with each other.

2. The optimized impeller for the split-type double-suction pump flow channel according to claim 1, characterized in that, The limiting post (31) is located on one side of the guide plate (3), and the other side of the guide plate (3) is provided with an inner ring (34). A locking block (4) is adapted to be screwed on the pump shaft (2). The locking block (4) has an outer ring (40) at one end facing the guide plate (3). The inner wall of the outer ring (40) and the outer wall of the inner ring (34) can be connected by threads.

3. The optimized impeller for the split-type double-suction pump flow channel according to claim 2, characterized in that, When the outer ring (40) is screwed onto the outside of the inner ring (34), the limiting post (31) is completely displaced to the inside of the perforation (13) and the guide plate (3) is in contact with the body (1).

4. The optimized impeller for the split-type double-suction pump flow channel according to claim 2, characterized in that, The limiting post (31) is provided with a piston (311) at one end inside the perforation (13). The outer wall of the piston (311) is in contact with the inner wall of the perforation (13). The outer wall of the limiting post (31) is separated from the inner wall of the perforation (13). A limiting tube (14) is also screwed into the perforation (13). The limiting post (31) passes through the limiting tube (14). The piston (311) is located outside the limiting tube (14). A compression spring (312) is provided between the two limiting posts (31) in the same perforation (13). When the guide plate (3) is in contact with the body (1), the compression spring (312) is in a compressed state.

5. The optimized impeller for the split-type double-suction pump flow channel according to claim 4, characterized in that, The length of the limiting tube (14) is less than the length of the limiting post (31), and the inner diameter of the limiting tube (14) is less than the outer diameter of the piston (311).

6. The optimized impeller for the split-type double-suction pump flow channel according to claim 4, characterized in that, One end of the compression spring (312) is connected to the end of one of the limiting posts (31) in the perforation (13), and the other end of the compression spring (312) is connected to the end of another limiting post (31) in the perforation (13).

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